JPH01125596A - Impeller for blower with excellent heat resistance and abrasion resistance - Google Patents
Impeller for blower with excellent heat resistance and abrasion resistanceInfo
- Publication number
- JPH01125596A JPH01125596A JP28449087A JP28449087A JPH01125596A JP H01125596 A JPH01125596 A JP H01125596A JP 28449087 A JP28449087 A JP 28449087A JP 28449087 A JP28449087 A JP 28449087A JP H01125596 A JPH01125596 A JP H01125596A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- blower
- resistance
- abrasion resistance
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005299 abrasion Methods 0.000 title claims abstract description 7
- 239000000919 ceramic Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 abstract description 16
- 239000000843 powder Substances 0.000 abstract description 13
- 238000003466 welding Methods 0.000 abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 abstract description 5
- 239000011247 coating layer Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000011261 inert gas Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010937 tungsten Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 239000002131 composite material Substances 0.000 description 13
- 239000000956 alloy Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000011651 chromium Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910003470 tongbaite Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910020630 Co Ni Inorganic materials 0.000 description 1
- 241001072332 Monia Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、各種工業炉等における送風機用羽根車に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an impeller for a blower in various industrial furnaces and the like.
工業炉等の各種プラントに付設される送風機の羽根車は
一最に金属材料からなり、使用条件に応じた種々の合金
材料からなる羽根車が使用されている。The impellers of blowers attached to various plants such as industrial furnaces are primarily made of metal materials, and impellers made of various alloy materials are used depending on the conditions of use.
しかるに、この種の送風機の中で、高温耐摩耗性が要求
される使用環境、特に取扱いガス温度が８５０℃をこえ
、１０００〜１２００℃に及び、しかも流体ガス中に多
種多様のダストが混在するような環境で使用される場合
、従来の羽根車では摩耗抵抗性が不足し、短期間に摩耗
による損傷が進行するため、安定性・耐久性に問題があ
る。その対策として、金属材料からなる羽根車の表面を
耐熱耐摩耗性合金の肉盛層で被覆保護したもの、あるい
はセラミックを羽根車材料とし、熱間静水圧加圧焼結法
等により製造したセラミック焼結晶を使用することが試
みられている。しかし、耐熱耐摩耗合金肉盛層で被覆保
護した羽根車は、１０００℃にも及ぶ高温使用環境にお
ける耐摩耗性、耐クリープ性等に乏しく、十分な解決策
とはなり得ない、他方、セラミック焼結晶は耐熱性の点
では問題ないが、靭性に乏しいため、気流中のダストの
衝突による破損が生じ易いという欠点があり、また大型
構造物の製造が困難である等の問題がある。However, this type of blower is used in environments where high-temperature wear resistance is required, in particular, the handling gas temperature exceeds 850°C and ranges from 1000 to 1200°C, and moreover, a wide variety of dusts are mixed in the fluid gas. When used in such environments, conventional impellers lack abrasion resistance and suffer damage due to wear over a short period of time, resulting in problems with stability and durability. As a countermeasure, the surface of the impeller made of metal material is coated and protected with a built-up layer of heat-resistant and wear-resistant alloy, or the impeller material is ceramic and is manufactured by hot isostatic pressing sintering method etc. Attempts have been made to use fired crystals. However, impellers coated and protected with heat-resistant and wear-resistant alloy build-up layers have poor wear resistance and creep resistance in high-temperature operating environments of up to 1000°C, and cannot be a sufficient solution. Although sintered crystals have no problem in terms of heat resistance, they have the disadvantage that they lack toughness and are easily damaged by collisions with dust in airflow, and they also have problems such as difficulty in manufacturing large structures.
本発明は上記に迄み、送風機用羽根車の高温耐摩耗性、
高温強度等を改善することを目的としてなされたもので
ある。Up to the above, the present invention provides high-temperature wear resistance of an impeller for a blower;
This was done for the purpose of improving high temperature strength etc.
〔問題点を解決するための手段および作用〕本発明の送
風機用羽根車は、その羽根車の金属基材表面に、金属マ
トリックスと該マトリックスに分散相として混在するセ
ラミック粒子とからなる複合組織を有する肉盛層（以下
、「複合肉盛層」）が形成されていることを特徴として
いる。[Means and effects for solving the problems] The impeller for a blower of the present invention has a composite structure on the surface of the metal base material of the impeller, which is composed of a metal matrix and ceramic particles mixed in the matrix as a dispersed phase. It is characterized by the formation of a built-up layer (hereinafter referred to as a "composite built-up layer").
本発明の送風機用羽根車の表面層をなしている複合肉盛
層は、金属とセラミックとの複合効果、特にセラミック
粒子の分散強化作用により、１０００℃ないしそれをこ
える高温度域において高位の耐摩耗性と安定した強度を
保有する。The composite overlay layer forming the surface layer of the blower impeller of the present invention has high resistance in the high temperature range of 1000°C or higher due to the combined effect of metal and ceramic, especially the dispersion strengthening effect of ceramic particles. Possesses wear resistance and stable strength.
第１図は本発明の送風機用羽根車の例を示している。（
１）は羽根車の羽根Ｆｉ（基材）であり、（２）は該羽
根板表面に形成された被覆層である。FIG. 1 shows an example of an impeller for a blower according to the present invention. (
1) is the blade Fi (base material) of the impeller, and (2) is the coating layer formed on the surface of the blade.
本発明の送風機用羽根車表面の複合被覆層は、マトリッ
クスとなる金属と分散相となるセラミック粉末との複合
材料を溶接肉盛材とし、タングステン不活性ガスアーク
溶接、プラズマ粉体溶接法等の溶接により形成すること
ができる。その溶接肉盛材は、金属粉末とセラミック粉
末との粉末混合物、あるいは金属チューブにセラミック
粉末を、もしくはセラミック粉末と金属粉末の混合粉末
を充填して複合ワイヤとしたもの等が使用される。The composite coating layer on the surface of the blower impeller of the present invention uses a composite material of a metal as a matrix and a ceramic powder as a dispersed phase as a weld overlay material, and is welded by tungsten inert gas arc welding, plasma powder welding, etc. It can be formed by The weld overlay material used is a powder mixture of metal powder and ceramic powder, or a metal tube filled with ceramic powder or a mixed powder of ceramic powder and metal powder to form a composite wire.
本発明の複合肉盛層のマトリックスとなる金属は、各種
の耐熱合金が適用されるが、その好ましい例として、Ｃ
：０．２〜０．４％、Ｓｉ：０．５〜２．０％、 Ｍｎ
：０．５〜２．０％、 Ｃｒ ： １０〜１６％、
Ｎｔ：１５〜２０％＋Ｃｏ：５〜１０％、残部実質的に
Ｆｅからなる合金鋼等が挙げられる。Various heat-resistant alloys can be used as the matrix metal of the composite overlay layer of the present invention, and a preferable example is C
:0.2~0.4%, Si:0.5~2.0%, Mn
: 0.5~2.0%, Cr: 10~16%,
Examples include alloy steels consisting of Nt: 15 to 20% + Co: 5 to 10%, and the remainder substantially Fe.
他方、分散相粒子となるセラミックとしては、炭化物系
、窒化物系、酸化物系等の種々のセラミック粉末を使用
することができるが、特に前記マトリックス金属との複
合化による肉盛層の高温摩耗抵抗性等の改善効果の点か
ら、炭化物系セラミック、例えば、炭化クロム（Ｃｒｓ
Ｃｔ、 Ｃｒ、Ｃｚ等）、炭化ニオブ（Ｎ ｂ Ｃ
）、炭化タングステン（ＷＣ）、炭化チタン（Ｔ ｉ
Ｃ）、炭化珪素（ＳｉＣ）等が好ましく用いられる。セ
ラミック粒子の粒径は特に限定しないが、その分散強化
作用を効果的に発揮させるために、粒径１０〜１００μ
ｍの範囲のものが好ましく使用される。また、マトリ・
ノクス金属に対するセラミック粉末の配合割合は、部材
の用途および要求される摩耗抵抗性等に応じて任意に決
定することができるが、セラミック粒子の分散強化作用
による摩耗抵抗性の十分な改善効果を得るためには、２
０重量％以上とすることが望ましい。On the other hand, various ceramic powders such as carbide-based, nitride-based, and oxide-based ceramic powders can be used as the dispersed phase particles. From the viewpoint of improving resistance etc., carbide ceramics such as chromium carbide (Crs
Ct, Cr, Cz, etc.), niobium carbide (N b C
), tungsten carbide (WC), titanium carbide (Ti
C), silicon carbide (SiC), etc. are preferably used. The particle size of the ceramic particles is not particularly limited, but in order to effectively exhibit the dispersion strengthening effect, the particle size should be 10 to 100μ.
Those in the range m are preferably used. Also, Matri
The blending ratio of ceramic powder to Nox metal can be arbitrarily determined depending on the use of the member and the required wear resistance, but the effect of sufficiently improving wear resistance due to the dispersion-strengthening effect of ceramic particles can be obtained. In order, 2
It is desirable that the content be 0% by weight or more.
その配合割合を高める程、肉盛層の硬度・耐摩耗性が向
上するが、あまり配合割合を多くすると、粒子結合金属
であるマトリックス金属の相対的減少により、肉盛層の
靭性が低下し、実機使用時の衝撃によるクラック発生傾
向の増加をみるので、８０重量％を上限とするのが好ま
しい。The higher the blending ratio, the higher the hardness and wear resistance of the build-up layer, but if the blending ratio is increased too much, the toughness of the build-up layer will decrease due to a relative decrease in the matrix metal, which is the particle-binding metal. It is preferable to set the upper limit to 80% by weight since the tendency to generate cracks increases due to impact during actual use.
なお、上記複合肉盛層により被覆保護される羽根車基材
の材質は、特に限定されないが、その具体例として、例
えばＣｒ ： ２８〜３１％、Ｎｉ：４７〜５１％、Ｗ
：５〜１５％、残部Ｆｅからなる耐熱合金が好ましく使
用される。The material of the impeller base material covered and protected by the composite overlay layer is not particularly limited, but specific examples include Cr: 28-31%, Ni: 47-51%, W.
: 5 to 15%, and the balance is preferably a heat-resistant alloy consisting of Fe.
第２図は、下記供試材（ａ）〜（ｅ）についてサンドブ
ラスト法による摩耗抵抗性を比較したちのである。供試
材（ａ）は発明例、供試材（ｂ）〜（ｅ）は比較例であ
る。FIG. 2 compares the abrasion resistance of the following test materials (a) to (e) by sandblasting. Sample material (a) is an invention example, and sample materials (b) to (e) are comparative examples.
供試林土ユ又皿更と
（ＴＩＧ溶接法による肉盛層）
マトリックス金属成分組成（＆４ｔ％）Ｃｒ ：５０％
、Ｎｉ：１７．５％、Ｃｏニア、５％、Ｆｅ：Ｂａｊ！
。Test forest soil Yumatara Sarato (overlay layer by TIG welding method) Matrix metal composition (&4t%) Cr: 50%
, Ni: 17.5%, Co Ni: 5%, Fe: Baj!
.
セラミック粒子：炭化クロム（ｃｒ３ｃｚ）マトリック
ス／セラミック（重量比）： ５０１５０供バＵえ健Ｌ
（鋳造材）
Ｃ：４％、Ｃｒ：１７％、Ｎｉ：３％、その他＝ｌθ％
、Ｃｏ：Ｂａｌ。Ceramic particles: Chromium carbide (CR3cz) Matrix/Ceramic (weight ratio): 50150 Toba Ueken L (Casting material) C: 4%, Cr: 17%, Ni: 3%, Others = lθ%
, Co:Bal.
哄パｌコーリｄ兜鮭Ｌ
（鋳造材）
Ｃ：４．５％、Ｗ：４０％、その他：１０％、Ｃｏ：ａ
ｌ
倣戊社土」ル較拠と
（鋳造材）
Ｃ：５．５％、Ｃｒ：２２％、Ｍｏニア％、Ｗ：２％、
Ｖ ： １％、Ｎｂ：８％、 Ｃｏ：Ｂａｌ哄バ
林土」止較斑と
アルミナセラミックの溶射肉盛層（Ａ／２０３１００％
）
サンドブラスト条件
（ｉ）ブラスト材：
七ランダム（昭和電工■製、ｒＡ−４１モランダム＃６
０）
（ｉｉ）ブラスト圧カニ３ｋｇ／ｃｎｌ（ｉｉｉ ）ブ
ラスト量：２ｋｇ
（ｉｖ ）ブラスト時間：９０秒
（ｖ）ノズル径＝５．６鶴
（ｖｉ ）ブラスト角度：０置板面に垂直）および６０
’（ｖｉ ）ノズル−試料間距離ニア０ｆｌ（ｖｉｉ
）試験温度： １０００℃
上記試験結果を示した第２図から明らかなように、本発
明の複合肉盛層（ａ）は金属材料（ｂ）〜（ｄ）に比べ
て高い摩耗抵抗性を有している。また、本発明の複合肉
盛Ｎ （ａ ）をセラミック肉盛層（ｅ）と比較すると
、サンドを傾斜吹付け（ブラスト角度６０”）した場合
の両者の摩耗減量に差はないが、垂直吹付け（ブラスト
角度０＠）において、セラミックＮ＜８”）の摩耗減量
が著しく増大しているのに対し、本発明の複合肉盛層（
ａ）のそれは低位にとどまっており、羽根車の保護層と
して好適な摩耗抵抗性を有していることがわかる。Kabuto Salmon L (Casting material) C: 4.5%, W: 40%, Others: 10%, Co: a
l Comparison of imitation soil (cast material) C: 5.5%, Cr: 22%, Monia%, W: 2%,
V: 1%, Nb: 8%, Co:Bal barin soil” staining spots and alumina ceramic thermal sprayed overlay (A/203 100%
) Sandblasting conditions (i) Blasting material: Seven Random (manufactured by Showa Denko ■, rA-41 Morundum #6
0) (ii) Blast pressure crab 3kg/cnl (iii) Blast amount: 2kg (iv) Blast time: 90 seconds (v) Nozzle diameter = 5.6 (vi) Blast angle: 0 perpendicular to the plate surface) and 60
'(vi) Nozzle-sample distance near 0fl (vii
) Test temperature: 1000°C As is clear from FIG. 2 showing the above test results, the composite overlay layer (a) of the present invention has higher wear resistance than the metal materials (b) to (d). are doing. Furthermore, when comparing the composite build-up N (a) of the present invention with the ceramic build-up layer (e), there is no difference in wear loss between the two when sand is blasted at an angle (blasting angle of 60"), but When applying (blasting angle 0＠), the wear loss of ceramic N < 8” increases significantly, whereas the composite overlay layer of the present invention (
It can be seen that the value of a) remains low and has abrasion resistance suitable as a protective layer for an impeller.
第１図に示した送風機用羽根車（羽根板基材：３０Ｃｒ
−５ＯＮ ｉ −１３Ｗ −Ｆ ｅ系耐熱合金ｆｉ４
）の表面に、ＴＩＧ溶接法により、前記供試材ａと同じ
組成の複合肉盛層を被覆形成（Ｎ厚：６ｍ）Ｌ、鋼材焼
鈍炉の均熱用送風機（５，５ＫＷ）に使用した。運転仕
様は次のとおりである。The blower impeller shown in Figure 1 (blade plate base material: 30Cr
-5ON i -13W -F e-based heat-resistant alloy fi4
) was coated with a composite overlay layer having the same composition as the sample material a by TIG welding (N thickness: 6 m) L, which was used for a soaking fan (5.5 KW) in a steel annealing furnace. . The operating specifications are as follows.
送風量：５０ｎｆ／ｗｉｎ
送風温度： １１００℃
送風圧カニ４５Ａｑ （ＨｚＯ）
羽根車回転数： ２３００ｒｐｍ
上記条件下に６ケ月間（実稼動： ２０００Ｈｒ ）使
用した後、羽根車を取出し、損傷の有無を観察した結果
、肉１１１ｔＮの表面の摩耗、および破損・亀裂、変形
、その他の欠陥は全（認められず、引き続き連続使用可
能な状態を有していることが確認された。なお、従来の
耐熱合金製羽根車では、摩耗、変形等により、送風効率
が低下するのに対し、上記発明例の羽根車を使用した場
合は、送風効率の低下がなく、焼鈍炉内の均熱効果が改
善され、鋼材熱処理時間を約５％短縮することができた
。Airflow rate: 50nf/win Airflow temperature: 1100℃ Airflow pressure 45Aq (HzO) Impeller rotation speed: 2300rpm After using the product under the above conditions for 6 months (actual operation: 2000Hr), remove the impeller and check for damage. As a result of observation, no wear, damage, cracks, deformation, or other defects were observed on the surface of the 111 tN meat, confirming that it can be used continuously. With alloy impellers, the blowing efficiency decreases due to wear, deformation, etc., but when the impeller of the above invention example is used, the blowing efficiency does not decrease and the uniform heating effect in the annealing furnace is improved. , the steel heat treatment time could be reduced by about 5%.
本発明の送風機用羽根車は、耐熱性・耐摩耗性にすぐれ
ており、鋼材熱処理炉など、ガス温度が１０００℃をこ
え、しかも多量のダストが混在している使用条件下にも
、長期に亘って、摩耗損傷、欠撰、変形等を生じず、高
位安定な送風効率を維持する。また、その耐用寿命の向
上に伴い、送風機のメンテナンスが大幅に軽減される。The blower impeller of the present invention has excellent heat resistance and wear resistance, and can be used for a long period of time even under usage conditions such as steel heat treatment furnaces where the gas temperature exceeds 1000°C and there is a large amount of dust mixed in. Throughout, it maintains a high level of stable air blowing efficiency without causing wear, damage, chipping, deformation, etc. Additionally, maintenance of the blower is significantly reduced due to its improved service life.
第１図（１）は本発明の実施例を示す斜視図、同図（Ｉ
Ｉ）はそのＩ−Ｉ断面図、第２図はサンドブラスト試験
結果を示すグラフである。
１：羽根板基材、２：複合肉盛層。
第１図
（ｎ）FIG. 1 (1) is a perspective view showing an embodiment of the present invention, and FIG.
I) is a sectional view taken along line II, and FIG. 2 is a graph showing the results of a sandblasting test. 1: Feather plate base material, 2: Composite overlay layer. Figure 1 (n)
Claims (1)
マトリックスに分散相として混在するセラミック粒子と
からなる肉盛層が形成されていることを特徴とする熱性
耐摩耗性にすぐれた送風機羽根車。(1) A blower blade with excellent thermal abrasion resistance, characterized in that a built-up layer consisting of a metal matrix and ceramic particles mixed as a dispersed phase in the matrix is formed on the surface of the metal base material of the impeller. car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28449087A JPH01125596A (en) | 1987-11-11 | 1987-11-11 | Impeller for blower with excellent heat resistance and abrasion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28449087A JPH01125596A (en) | 1987-11-11 | 1987-11-11 | Impeller for blower with excellent heat resistance and abrasion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01125596A true JPH01125596A (en) | 1989-05-18 |
Family
ID=17679190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28449087A Pending JPH01125596A (en) | 1987-11-11 | 1987-11-11 | Impeller for blower with excellent heat resistance and abrasion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01125596A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1097680C (en) * | 1997-01-17 | 2003-01-01 | Abb弗莱克特有限公司 | Evaporating fan and its blade wheel |
-
1987
- 1987-11-11 JP JP28449087A patent/JPH01125596A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1097680C (en) * | 1997-01-17 | 2003-01-01 | Abb弗莱克特有限公司 | Evaporating fan and its blade wheel |
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